linux-kernel - Re: [PATCH] drm/exynos: fix double call of drm_prime_(init/destroy)_file

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Date:	Thu, 06 Sep 2012 11:15:11 +0900
From:	김승우 <sw0312.kim@...sung.com>
To:	Mandeep Singh Baines <msb@...omium.org>
Cc:	Inki Dae <inki.dae@...sung.com>, linux-kernel@...r.kernel.org,
	Stéphane Marchesin <marcheu@...omium.org>,
	Pawel Osciak <posciak@...gle.com>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/exynos: fix double call of
 drm_prime_(init/destroy)_file_private

Hi Mandeep,

On 2012년 09월 06일 06:47, Mandeep Singh Baines wrote:
> The double invocations are incorrect but seem to be safe so I don't
> think this will fix any bugs.
> 
> Before:
> 
> [    7.639366] drm_prime_init_file ee3675d0
> [    7.639377] drm_prime_init_file ee3675d0
> [    7.639507] drm_prime_destroy_file ee3675d0
> [    7.639518] drm_prime_destroy_file ee3675d0
> [    7.639802] drm_prime_init_file ee372390
> [    7.639810] drm_prime_init_file ee372390
> [    8.473316] drm_prime_init_file ee356390
> [    8.473331] drm_prime_init_file ee356390
> 
> After:
> 
> [    6.363842] drm_prime_init_file edc2e5d0
> [    6.363994] drm_prime_destroy_file edc2e5d0
> [    6.364260] drm_prime_init_file edc2e750
> [    8.004837] drm_prime_init_file ee36ded0
> 

You are right. prime file_priv is handled by drm_fops.c, so it can be
removed from exynos drm.

Thanks for your patch.

> Signed-off-by: Mandeep Singh Baines <msb@...omium.org>
> CC: Stéphane Marchesin <marcheu@...omium.org>
> CC: Pawel Osciak <posciak@...gle.com>
> CC: Inki Dae <inki.dae@...sung.com>
> CC: Joonyoung Shim <jy0922.shim@...sung.com>
> CC: Seung-Woo Kim <sw0312.kim@...sung.com>
> CC: Kyungmin Park <kyungmin.park@...sung.com>
> CC: David Airlie <airlied@...ux.ie>
> CC: dri-devel@...ts.freedesktop.org

Acked-by: Seung-Woo Kim <sw0312.kim@...sung.com>

> ---
>  drivers/gpu/drm/exynos/exynos_drm_drv.c |    2 --
>  1 files changed, 0 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> index ebacec6..a27b8ff 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> @@ -160,7 +160,6 @@ static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
>  	if (!file_priv)
>  		return -ENOMEM;
>  
> -	drm_prime_init_file_private(&file->prime);
>  	file->driver_priv = file_priv;
>  
>  	return exynos_drm_subdrv_open(dev, file);
> @@ -184,7 +183,6 @@ static void exynos_drm_preclose(struct drm_device *dev,
>  			e->base.destroy(&e->base);
>  		}
>  	}
> -	drm_prime_destroy_file_private(&file->prime);
>  	spin_unlock_irqrestore(&dev->event_lock, flags);
>  
>  	exynos_drm_subdrv_close(dev, file);
> 

-- 
Seung-Woo Kim
Samsung Software R&D Center
--

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